1641528965 has 16 divisors (see below), whose sum is σ = 1995003648. Its totient is φ = 1296535296.

The previous prime is 1641528901. The next prime is 1641528989. The reversal of 1641528965 is 5698251461.

It is not a de Polignac number, because 1641528965 - 2⁶ = 1641528901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143072 + ... + 154118.

It is an arithmetic number, because the mean of its divisors is an integer number (124687728).

Almost surely, 2^1641528965 is an apocalyptic number.

It is an amenable number.

1641528965 is a deficient number, since it is larger than the sum of its proper divisors (353474683).

1641528965 is a wasteful number, since it uses less digits than its factorization.

1641528965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11428.

The product of its digits is 518400, while the sum is 47.

The square root of 1641528965 is about 40515.7866146025. The cubic root of 1641528965 is about 1179.6400714461.

The spelling of 1641528965 in words is "one billion, six hundred forty-one million, five hundred twenty-eight thousand, nine hundred sixty-five".